You can determine whether your virtual disk is in thick or thin format.

Launch the vSphere Client and log in to a vCenter Server system or an ESXi host.

1

Select the virtual machine in the inventory.

2

Click Edit Settings to display the Virtual Machine Properties dialog box.

3

Click the Hardware tab and select the appropriate hard disk in the Hardware list.

The Disk Provisioning section on the right shows the type of your virtual disk.

4

Click OK.

If your virtual disk is in the thin format, you can inflate it to its full size.